Polyimide-containing filtration membrane, filters, and methods
AssigneeEntegris, Inc.
InventorsYasushi OYASHIKI, Akihiro SAKANO
Life of this patent
Estimating the term…
Abstract
Described are filtration membranes that include a porous polyimide membrane and thermally stable ionic groups; filters and filter components that include these filtration membranes; methods of making the filtration membranes, filters, and filter components; and method of using a filtration membrane, filter component, or filter to remove unwanted material from fluid.
Claims18
A filter component comprising:
- a porous filtration membrane comprising polyimide polymer and having an edge;
- and
- a support piece comprising thermoplastic fluoropolymer,
- wherein the edge is thermally bonded to the support piece to provide a fluid-tight seal between the edge and the support piece.
A method of preparing a filter component that includes a porous filtration membrane in contact with thermoplastic fluoropolymer, the porous filtration membrane comprising polyimide polymer and having an edge, the method comprising heating the thermoplastic fluoropolymer to soften the thermoplastic fluoropolymer.
Dependencies are inferred from the claim text.